212545011 has 16 divisors (see below), whose sum is σ = 326354688. Its totient is φ = 120525600.

The previous prime is 212545009. The next prime is 212545019. The reversal of 212545011 is 110545212.

It is not a de Polignac number, because 212545011 - 2¹ = 212545009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (212545019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35880 + ... + 41381.

It is an arithmetic number, because the mean of its divisors is an integer number (20397168).

Almost surely, 2^212545011 is an apocalyptic number.

212545011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212545011 is a deficient number, since it is larger than the sum of its proper divisors (113809677).

212545011 is a wasteful number, since it uses less digits than its factorization.

212545011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77402.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 212545011 is about 14578.9235199311. The cubic root of 212545011 is about 596.7837262221.

The spelling of 212545011 in words is "two hundred twelve million, five hundred forty-five thousand, eleven".